Richard wagner



(No Model.) 2 Sheets-Sheet 1.

R. WAGNER. TURNING LATHE.

Patnted Apr. 30, 1895 y zb/wvzz flaw. 731:

THE NORRIS PETERS c0 PNIOTO-LITNOH WASMINGYGN, u. c.

2 Sheets-Sheet 2.

2 gm: w f

(No Model.)

R- WAGNER. TURNING LATHE.

Pate nted' Apr; so, 1895.

n: NORRIS wrrzns co. mm'ouma, WASHINGTON, a. c.

UNITED STATES PATENT OFFICE.

RICHARD WAGNER, OF BGBLINGEN, GERMANY.

TURNING-LATHE.

SPECIFICATION forming part of Letters Patent No. 538,304,'dated April 30, 1895.

Applieation filed November 7,1894. smart. 528,152. (NomcdeL) To all whom it may concern:

Be it known that I, RICHARD WAGNER, mechanic, of 449. Stuttgarterstrasse, Boblingen, Wiirtemberg, Germany, have invented new and useful Improvements Connected with Turning-Lathes, of which the. following is a specification, reference being had therein to the accompanying drawings.

This invention relates to mechanism for turning convex pulleys and the like, especially large sized pulleys and fly wheels, and it is characterized by extreme simplicity. The mechanism can be readily applied to lathes without subjecting them to structural alteration.

- On the annexed sheet of drawings, which illustrate my invention, Figure 1 is a side View partly in section of the device. Fig.2 is a plan view with a part in horizontal section. Fig. 3 is a vertical section on the line -00 Fig. 2. Fig. 4 shows a modification of Fig. 2. Fig. 5 is a detail plan view. Fig. 6 is a cross section on the line y-y Fig. 5. Fig. 7 shows the apparatus as it appears when fitted to a lathe.

The main feature of the invention consists in so guiding a two'armed lever movably secured to the slide rest of the lathe, and one arm of which carries the turning tool, by the aid of a second lever also secured to the slide rest, and hence compelled to followits motion, that, as the said slide rest is moved along, the turning tool is brought nearer to or moved farther from the mandrel according to the amount of convexity which it is desired to produce on the surface of the pulley. The stroke of the second lever is produced by fixing one of its ends to the lathe bed in such a manner that it cannot follow the slide rest in its movements.

The invention is carried into effector practice in the following manner: A hollow quadrilateral support box or shell B which is fixed to the slide rest by means of a clamp, S, has fulcrumed on the bolt a in its front end a two armed lever A. The front end of this lever has a clamp in which the turning tool W is secured while its rear end has a recessed guide surface against which the roller F bears. This roller F is carried on a bolt 0 in the forked end of the lever O which latter is pivotally connected by the pin 6 to the arm B of the shell B. The oscillating back end of the lever O is provided with holes 01 through any one of which, as desired, the pin fon the forked end of the link E can be passed. The opposite end of the link E is pivoted to any suitable part of the lathe bed.

In the example shown at Fig. 7 the link E is secured to a block L by a pivot pin G. A spring D (Fig. 2) bears at one end against the arm B and at theother against the end of the lever A in such manner that the latter is constantly pressed against the roller F.

The modus operandi is as followsz After the shell B has been firmly secured to the slide rest by the clamp S (Fig. 7) the apparatus is so arranged, that, when the turning tool is in the central plane of the pulley requiring to be turned, the lever 0 assumes a position (as shown) at right angles to the axial line of the mandrel. Whenthe slide rest is drawn back the lever 0 moving on the pinsfand b, is drawn into an oblique position relatively with the axial line of the mandrel as indicated by the dotted line m, and, as a consequence, the roller F is caused to press the recessed end of the lever A back against the action of spring D and thereby force its other end forward, in this manner causing the tool W to approach nearer to the centers of the lathe. The movement or stroke of the lever C can be regulated by shifting the pinf(and thereby the bar E) in the holes (1 of the lover. The greater the stroke the greater will be the curve along which the tool is guided, that is to say, the greater will be the convexity given to the pulley being turned. After having in this manner properly set the tool the slide rest is moved forward regularly so that the lever O gradually approaches a position at right angles to the axial line of the mandrel which it attains when the tool W has arrived at the center of the pulley as shown at Fig. 7. During this movement the tool has gradually moved from its minimum distance from the line of the lathe centers to its maximum distance from them, and as a consequence, one half of the pulley has been turned with a convex surface. As the movement of the slide rest proceeds the tool W is again gradually brought back again from the maximum to the minimum distance from the lathe centers and the other of thelinlLE.

half of the pulley is, as a consequence turned with a convexisurface. Whenthe tnrningof the pulley is finished the lever C is in the position represented by the dotted line m while the pin f is at f", the roller pin 0 at 0 and the pin 1) which moves in a lineparallel with the screwedspindlemisat-b".

It may be necessary with some constructions of lathe to fit the lever C onathe other; side of the lathe bed. This may be e'flected in the manner shown at Fig. 4. In this arrangement the pint takestheplace of .the; pin b,by which the lever is pivoted to the arm I), while the pin 0 takes' the place cit-'the-pin c of the pressure roller F. The operation is exactly the same as before.

.Figs. 5 and 6 show-.a modificationoftthei lever 0 wherein a slot d'ltakes .the iplace of;

the holes (1 (Fig.2). The linkFEissecured to v the lever G by a clamping boltorsscmw:e passed through theslot. .On :slackeningzthef, nut of the bolt e thelinktE can beishifted up! and down the slot-as desired in order to reg-l ulate the amount of convexity desiredt-to be? given to the .work. i

A. graduated scalemay. if desired be cutonl the lever-C inorder to facilitate :theesettingi What I.claim,and desire .to:securetby Let-i ters Patent ofithe Unite'd States, is-

1. A lathe attachment tconsisting of the? combinationwith theslide-rest of a lever hav-E ing .means for carrying a tool and gpivotallyi mounted onsaid rest, asecondlever atlanl angle tothe former, engaging one arm'thereof,l and mountedontheslide-rest, anda connec-l tion between the. second lever and the lathe: bed, substantially as set forth.

2. A-lathe attachment consistingof a box%; or support adapted to be carriedby the slide-l rest, a lever mounted it on said support-and; having means forcarrying thertooll and pro-l vided with a guide surface, a second tlever; pivotally mounted on-said support,1at an'anglei to-the first leverand engaging said guide surface, anda connection with thel lathe bed for limiting the movement of one arm of said second lever, substantially as set forth.

8. A lathe attachment consisting of a box or support adapted to be carried by the slide- 'rest,a lever mounted -on said support and having means for carrying the tool and provided with a guide surface, a second lever pivotally mounted on said support, at an angle to the first lever and engaging said guide surface,--a springacting upon said levers to maintain their engagement and a connection with the lathe bed for limiting the movement of one arm of said second lever, substantially as set forth.

4. A 'lathe @attachment consisting of the combination oftthexboxiBehaving the-armB', :t-he lever-A pivotally mounted insaid boxand :having means forcarryingthe tool andiprovided with a; guidesurface, the second lever -C pivotally mounted :on said arm and .pro-

vided with a rollerzfor-rengagin-g said guide wsurface az-spring D=interposed between said arm andtthe saidlever 1A, and.a connection with-the lathe bed for limiting the movement rotione-armi of theile-ver- C,substantially asset :forth.

5. The combination-with the bed and sliderest of a lathe, of a lever pivotally mounted upon theslide rest and having means for car- 'ryingva tool,xa 'secondtlever atian angleto the former, engaging one larm 'thereof and pivotallytconnected withtsaid .slide rest, and a econnection'for-limitingtthe'movement of one arm ofxsaid secondzlever, from the lathe bed, .substantiallyas set-forth.

In witness whereoflhereunto set my hand in presence of -.two witnesses.

RICHARD WAGNER.

Witnesses: WILLIAMS ATALnY, WM. HAHN. 

